zig_version_status

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are provided, so the description carries full responsibility for behavioral disclosure. It describes the return values and the underlying comparison action, and implicitly implies a read-only operation (no mutation language). However, it does not explicitly state side effects, network requirements, or error behavior, which for a status tool could be expected. It adds value beyond the name but leaves some gaps.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences, front-loading the core purpose and then detailing the output and usage context. Every sentence earns its place with no redundant words, and the structure is easy to parse.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool is simple (one optional boolean parameter) and has an output schema, so the description needn't explain return structure. However, the lack of any explanation for the 'force' parameter and no mention of prerequisites (e.g., network access or presence of ZIG) leaves gaps. The description covers the main use case but not all context needed for safe and correct invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema describes a single boolean parameter 'force' with a default but no description, and schema coverage is 0%. The description does not mention this parameter at all, leaving the agent to guess what 'force' does (e.g., bypass cache, force network fetch). Since there is zero coverage and no explanation, the description fails to provide needed semantics for this parameter.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses the specific verb 'Compare' with a clear resource ('local `zig version` with the latest upstream release') and enumerates exactly what is returned. It also differentiates from siblings like zig_update by focusing on status rather than modification, so an agent can select it without ambiguity.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly states when to use the tool: 'before version-sensitive answers' and 'whenever Zig code misbehaves in ways a newer compiler fixes.' It does not mention when not to use it or point to alternatives, which would make it a 5, but the guidance is clear and actionable.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.